java 有用代码

1，实现按汉语拼音的排序

    public static void sortByPinyin() {
        String[] arr = { "刘刘", "李飞", "王五", "老三", "贝贝", "啊三" };
        Collator cmp = Collator.getInstance(java.util.Locale.CHINA);
        Arrays.sort(arr, cmp);
        List<String> list = Arrays.asList(arr);
        System.out.println(list);
    }

 2,获取uuid

UUID.randomUUID().toString()